agenttesla | f0815e3a862e22963efd7e5f0f8bdda72cbb13a874dfeca3011d819342a83f35

General

Target

$PLUGINSDIR/upspw.dll
Size

20KB
MD5

0f91acfbdd02bae9c793e8e8a4b70c95
SHA1

78e61c3a75786e9667f299d99509b0d10e1860fc
SHA256

cae5f924fa04faa67dd7033706ee6af0e045c91b2e2d10c03cd45182a9b3da31
SHA512

f9ae967537378efb79b9d43e9b987903137d5f0643bb39379284e68d51028ac8c4cf6652bf8019f6de77834095c127b6281a84a4f98e574d889197fec582b479
SSDEEP

384:PkNXKtjQfcNzoFqacGdJ+flViKEtKGmk33:PkNXKtu3D0flkK+H

Score

10^/10

agenttesla collection credential_access discovery keylogger spyware stealer trojan

Malware Config

Extracted

Family

agenttesla

C2

https://api.telegram.org/bot1948592798:AAEPqwEad_OoXqml68rtg1qHOajQ46ljm48/sendDocument

Signatures

AgentTesla
Agent Tesla is a remote access tool (RAT) written in visual basic.
keylogger trojan stealer spyware agenttesla
Agenttesla family
agenttesla

AgentTesla payload 4 IoCs

resource	yara_rule
behavioral3/memory/2836-1-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/2836-3-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/2836-5-0x0000000000400000-0x000000000044C000-memory.dmp	family_agenttesla
behavioral3/memory/2836-7-0x00000000003A0000-0x00000000003DC000-memory.dmp	family_agenttesla

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003
Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rundll32.exe
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rundll32.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2820 set thread context of 2836	2820	rundll32.exe	31

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2836	rundll32.exe
2836	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2836	rundll32.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2692 wrote to memory of 2820	2692	rundll32.exe	30
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31
PID 2820 wrote to memory of 2836	2820	rundll32.exe	31

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rundll32.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	rundll32.exe

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\upspw.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2692
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\upspw.dll,#1
  2⤵
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2820
- - C:\Windows\SysWOW64\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\$PLUGINSDIR\upspw.dll,#1
    3⤵
    - Accesses Microsoft Outlook profiles
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - outlook_office_path
    - outlook_win_path
    PID:2836

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials from Password Stores

1

T1555

Credentials from Web Browsers

1

T1555.003

Unsecured Credentials

5

T1552

Credentials In Files

4

T1552.001

Credentials in Registry

1

T1552.002

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2820-0-0x0000000010005000-0x0000000010007000-memory.dmp

Filesize
8KB

Download
memory/2836-1-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2836-3-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2836-5-0x0000000000400000-0x000000000044C000-memory.dmp

Filesize
304KB

Download
memory/2836-6-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/2836-7-0x00000000003A0000-0x00000000003DC000-memory.dmp

Filesize
240KB

Download
memory/2836-8-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-9-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-10-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-11-0x0000000073B9E000-0x0000000073B9F000-memory.dmp

Filesize
4KB

Download
memory/2836-12-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-13-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download
memory/2836-14-0x0000000073B90000-0x000000007427E000-memory.dmp

Filesize
6.9MB

Download

Analysis

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